OpenSolaris_b135/lib/libpp/common/ppargs.c
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1986-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Research
*
* common preprocessor command line argument parse
* called by optjoin()
*/
static const char usage[] =
"[-?\n@(#)$Id: cpp (AT&T Research) 2009-02-02 $\n]"
USAGE_LICENSE
"[+NAME?cpp - C language preprocessor]"
"[+DESCRIPTION?\bcpp\b is the preprocessor for all C language dialects. It is"
" a standalone version of the \blibpp\b(3) preprocessor library. The"
" C dialect implemented by \bcpp\b is determined by probing \bcc\b(1)"
" using \bprobe\b(1). The path of the emulated compiler can be changed"
" by the \b-D-X\b command line option.]"
"[+?If \aoutput\a is omitted then the standard output is written; if \ainput\a"
" is also omitted then the standard input is read. NOTE: this is an"
" ancient, non-standard, non-intuitiive file operand syntax that is"
" required by \bcc\b(1); use shell file name expansion at your peril.]"
"[+?\bcpp\b specific options are set by the \b-D-\b and \b-I-\b options.]"
"[C:comments?Pass comments to the output. By default comments are omitted.]"
"[D:define?Define the macro \aname\a to have \avalue\a; \b1\b is assumed if"
" \b=\b\avalue\a is omitted. If \aname\a begins with \b:\b then it is"
" interpreted as a \blibpp\b(3) \b#pragma pp:\b statement; if \aname\a"
" begins with \b%\b then it is interpreted as a \blibpp\b(3) \b#\b"
" directive statement; if \aname\a begins with \b-\b or \b+\b then it is"
" interpreted as a \blibpp\b(3) option; \b-\b turns the option on,"
" \b+\b turns it off. Most options have a \b#pragma\b counterpart that"
" is listed with the option definition. Right, this is ugly, but its the"
" only portable way to pass options through \bcc\b(1) to"
" \bcpp\b:]:[name[=value]]]{"
" [+-D-C, pp::compatibility?Preprocess for K&R compatibility.]"
" [+-D-D\alevel\a, \bpp::debug\b \alevel\a?Set the debug trace level."
" Higher levels produce more output. Levels higher than 3"
" enabled only in \b-g\b compiled versions.]"
" [+-D-F\aname\a?Set the main input file name to \aname\a. This only"
" affects error message and line sync output.]"
" [+-D-H, pp::hosted?All directories are hosted; compatibility"
" warning messages from hosted directory headers are suppressed.]"
" [+-D-I, pp::cdir?All directories contain C headers; used only with"
" \b-D-+\b.]"
" [+-D-K, pp::keyargs?Enable the non-standard \aname=value\a macro"
" argument mode.]"
" [+-D-L\b[\aid\a]], \bpp::lineid\b [\aid\a]]?Set the line sync directive"
" id to \aid\a or null if omitted.]"
" [+-D-M, pp::nomultiple?Disable multiple include detection.]"
" [+-D-P, pp::passthrough?Enable the non-standard passthrough mode; may"
" be useful for processing non-C input.]"
" [+-D-Q, pp::dump?Dump macro definitions to the output so that the"
" output may be passed through \bcpp\b again. Used for"
" generating precompiled headers.]"
" [+-D-R, pp::transition?Enable the transition preprocessing mode. Used"
" for compilers that can't make up their semantics between"
" K&R and ISO.]"
" [+-D-S, pp::strict?Enable strict preprocessing semantics and warnings."
" Works with any mode (compatibiliy, transition,"
" or the default ISO).]"
" [+-D-T\atest\a, \bpp::test\b \atest\a?Enable implementation specific"
" test code according to \atest\a.]"
" [+-D-W, pp::warn?Enable warnings in non-hosted files.]"
" [+-D-X\b[\acc\a]]?Preprocess for the compiler \acc\a which must be"
" an executable path or an executable on \b$PATH\b.]"
" [+-D-Y, pp::pedantic?Enable pedantic \bpp::warn\b warnings in"
" non-hosted files.]"
" [+-D-Z, pp::pool?Enable pool mode. See \blibpp\b(3).]"
" [+-D-d?List canonicalized \b#define\b statements for non-predefined"
" macros in the output. ]"
" [+-D-m?List canonicalized \b#define\b statements for all macros. All"
" other output is disabled.]"
" [+-D-+, pp::plusplus?Preprocess for the C++ dialect.]"
"}"
"[I:include?Append \adirectory\a to the list of directories searched for"
" \b#include\b files. If \adirectory\a is \b-\b then: (1) \b-I\b"
" directories before \b-I-\b are searched only for \"...\" include"
" files; (2) \b-I\b directories after \b-I-\b are searched for"
" \"...\" and <...> include files; (3) the directory \b.\b is searched"
" only if it is explicitly specified by a \b-I\b option.]:?[directory]{"
" [+-I-C\adirectory\a, \bpp::cdir\b \adirectory\a?Mark \adirectory\a"
" as a C header directory. Used with \bpp:plusplus\b.]"
" [+-I-D[\afile\a]]?Read the default \bprobe\b(1) definitions from"
" \afile\a, or ignore the default definitions if \afile\a"
" is omitted.]"
" [+-I-H\adirectory\a, \bpp::hostdir\b \adirectory\a?Mark \adirectory\a"
" as a hosted directory. Headers from hosted directories have"
" compatibility warnings disabled.]"
" [+-I-I\aheader\a, \bpp::ignore\b \aheader\a?Add \aheader\a to the"
" list of ignored headers.]"
" [+-I-M\afile\a?\afile\a contains a sequence of \aheader\a"
" [= \"\amap\a\" ]] lines, where \aheader\a is either <\aname\a>"
" or \"\aname\a\", and \"\amap\a\" is an explicit binding"
" for \aheader\a. \aheader\a is ignored if = \"\amap\a\" is"
" omitted.]"
" [+-I-R\afile\a?Include \afile\a but do not emit text or line syncs.]"
" [+-I-S\adirectory\a?Add \adirectory\a to the default standard include"
" directory list.]"
" [+-I-T\afile\a?Include \afile\a and emit text to the output file.]"
"}"
"[M:dependencies?Generate \bmake\b(1) dependencies. Not needed with"
" \bnmake\b(1). \b-M\b may be followed by optional \aflags\a to change"
" dependency output styles:]{"
" [+D?Generate dependencies in a separate \b.d\b file. Preprocessed"
" output is still written to \aoutput\a, or the standard output"
" if \aoutput\a is omitted.]"
" [+G?Generate missing dependencies too.]"
" [+M?Only generate local header dependencies; \ahosted\a headers are"
" omitted. Note that \ahosted\a headers are determined by"
" \b-I-H\b and the \bpp:hosted\b and \bpp:hostdir\b pragmas;"
" no special distiction is made between \"\" and <> \binclude\b"
" styles.]"
"}"
"[P!:sync?Emit line syncs.]"
"[U:undefine?Remove the definition for the macro \aname\a.]:[name]"
"[A:assert?Enter the assertion via \b#assert\b for system V"
" compatibility.]:[assertion]"
"[E:preprocess?Ignored for compatibility with ancient compilers.]"
"[H:include-reference?Emit \b#include\b file paths on the standard error,"
" one per line, indented to show nesting.]"
"[T?If not \bgcc\b(1) then truncate identifiers to \alength\a"
" characters for compatibility with old AT&T (I guess only Lucent needs"
" them now) compilers.]#?[length]"
"[V:version?Emit the \blibpp\b(3) version.]"
"[X:argmode?Enable \aname\a=\avalue\a macro arguments for \beasel\b(1)"
" compatibility.]"
"[Y:standard?Add \adirectory\a to the list searched for"
" \b#include\b \b<...>\b files.]:[directory]"
"\n"
"\n[ input [ output ] ]\n"
"\n"
"[+SEE ALSO?\bcc\b(1), \bgcc\b(1), \blibpp\b(3)]"
;
#include "pplib.h"
#include <ctype.h>
/*
* convert lint comments to pragmas
*/
static void
pplint(char* head, char* comment, char* tail, int line)
{
NoP(line);
if (strmatch(comment, "(ARGSUSED|PRINTFLIKE|PROTOLIB|SCANFLIKE|VARARGS)*([0-9])|CONSTCOND|CONSTANTCOND|CONSTANTCONDITION|EMPTY|FALLTHRU|FALLTHROUGH|LINTLIBRARY|LINTED*|NOTREACHED"))
{
strncopy(pp.token, comment, MAXTOKEN);
ppprintf("\n#%s %s:%s\n", dirname(PRAGMA), pp.pass, pp.token);
ppline(error_info.line, NiL);
}
}
/*
* if last!=0 then argv[opt_info.index]==0 with return(0)
* else if argv[opt_info.index]==0 then return(0)
* otherwise argv[opt_info.index] is the first unrecognized
* option with return(1)
*
* use last=0 if the preprocessor is combined with other passes
* so that unknown options may be interpreted for those passes
*/
int
ppargs(char** argv, int last)
{
register char* s;
register int c;
register int n;
char* p;
/*
* check the args and initialize
*/
if (!error_info.id)
error_info.id = "cpp";
for (;;)
{
for (; c = optget(argv, usage); last = 0) switch (c)
{
case 'C':
ppop(PP_COMMENT, ppcomment);
break;
case 'D':
/*
* this allows single arg pp option extensions
* without touching cc
* (not all cc wrappers have -W...)
*/
switch (*(s = opt_info.arg))
{
case '-':
case '+':
n = (*s++ == '-');
while (c = *s++) switch (c)
{
case 'C':
ppop(PP_COMPATIBILITY, n);
break;
case 'D':
if (n && ((c = strtol(s, &p, 0)) || p != s))
{
s = p;
n = c;
}
ppop(PP_DEBUG, -n);
break;
case 'F':
ppop(PP_FILENAME, n ? s : NiL);
goto hasarg;
case 'H':
ppop(PP_HOSTDIR, "-", n);
break;
case 'I':
ppop(PP_CDIR, "-", n);
break;
case 'K':
ppop(PP_KEYARGS, n);
break;
case 'L':
ppop(PP_LINEID, n && *s ? s : "line");
goto hasarg;
case 'M':
ppop(PP_MULTIPLE, !n);
break;
case 'P':
ppop(PP_PASSTHROUGH, n);
break;
case 'Q':
ppop(PP_DUMP, n);
break;
case 'R':
ppop(PP_TRANSITION, n);
break;
case 'S':
ppop(PP_STRICT, n);
break;
case 'T':
ppop(PP_TEST, s);
goto hasarg;
case 'V':
ppop(PP_VENDOR, "-", n);
break;
case 'W':
ppop(PP_WARN, n);
break;
case 'X':
ppop(PP_PROBE, n && *s ? s : 0);
goto hasarg;
case 'Y':
ppop(PP_PEDANTIC, n);
break;
case 'Z':
ppop(PP_POOL, n);
break;
case 'd':
pp.option |= DEFINITIONS;
break;
case 'm':
pp.state |= NOTEXT;
pp.option |= KEEPNOTEXT|DEFINITIONS|PREDEFINITIONS;
pp.linesync = 0;
break;
case '+':
ppop(PP_PLUSPLUS, n);
break;
default:
if (pp.optarg)
{
if ((c = (*pp.optarg)(n, c, s)) > 0) goto hasarg;
else if (!c) break;
}
error(1, "%c%s: unknown -D option overload", n ? '-' : '+', s - 1);
goto hasarg;
}
hasarg:
break;
case ':':
ppop(PP_OPTION, s + 1);
break;
case '%':
ppop(PP_DIRECTIVE, s + 1);
break;
case '_':
if (strmatch(s, "__GNUC__*"))
pp.arg_style |= STYLE_gnu;
else if (strmatch(s, "__(ANSI|STDC|STRICT)__*") || !(pp.arg_style & STYLE_gnu) && strmatch(s, "__STRICT_ANSI__*"))
ppop(PP_STRICT, 1);
else if (strmatch(s, "__cplusplus*"))
ppop(PP_PLUSPLUS, 1);
/*FALLTHROUGH*/
default:
ppop(PP_DEFINE, s);
break;
}
break;
case 'E':
/* historically ignored */
break;
case 'I':
if (!(s = opt_info.arg))
{
/*
* some compilers interpret `-I ...' as
* `-I-S' and arg ... while others interpret
* it as `-I...'
*/
p = "-S";
if ((s = argv[opt_info.index]) && ((n = *s++) == '-' || n == '+') && *s++ == 'D')
{
if (isalpha(*s) || *s == '_')
while (isalnum(*++s) || *s == '_');
if (*s && *s != '=' && *s != '-' && *s != '+')
p = argv[opt_info.index++];
}
s = p;
}
switch (*s)
{
case '-':
case '+':
n = *(p = s++) == '-';
c = *s++;
if (!n && !*s) s = 0;
switch (c)
{
case 0:
ppop(PP_LOCAL);
break;
case 'C':
ppop(PP_CDIR, s, n);
break;
case 'D':
ppop(PP_DEFAULT, s);
break;
case 'H':
ppop(PP_HOSTDIR, s, n);
break;
case 'I':
ppop(PP_IGNORE, s);
break;
case 'M':
ppop(PP_IGNORELIST, s);
break;
case 'R':
ppop(PP_READ, s);
break;
case 'S':
ppop(PP_STANDARD, s);
break;
case 'T':
ppop(PP_TEXT, s);
break;
case 'V':
ppop(PP_VENDOR, s, n);
break;
default:
error(1, "%s: unknown -I option overload", p);
break;
}
break;
default:
ppop(PP_INCLUDE, s);
break;
}
break;
case 'M':
for (n = PP_deps; argv[opt_info.index]; opt_info.offset++)
{
switch (argv[opt_info.index][opt_info.offset])
{
case 'D':
n |= PP_deps_file;
continue;
case 'G':
n |= PP_deps_generated;
continue;
case 'M':
n |= PP_deps_local;
continue;
}
break;
}
ppop(PP_FILEDEPS, n);
break;
case 'P':
ppop(PP_LINE, (PPLINESYNC)0);
break;
case 'U':
ppop(PP_UNDEF, opt_info.arg);
break;
/*
* System V CCS compatibility
*/
case 'A':
if (isalpha(opt_info.arg[0]) || opt_info.arg[0] == '_' || opt_info.arg[0] == '$')
ppop(PP_ASSERT, opt_info.arg);
break;
case 'H':
ppop(PP_INCREF, ppincref);
break;
case 'T':
if (!(pp.arg_style & STYLE_gnu))
ppop(PP_TRUNCATE, TRUNCLENGTH);
/* else enable ANSI trigraphs -- default */
break;
case 'V':
error(0, "%s", pp.version);
break;
case 'X':
pp.arg_mode = (*(opt_info.arg + 1) || pp.arg_mode && pp.arg_mode != *opt_info.arg) ? '-' : *opt_info.arg;
break;
case 'Y':
if (*(s = opt_info.arg) && *(s + 1) == ',')
{
if (*s != 'I') break;
s += 2;
}
ppop(PP_STANDARD, s);
break;
/*
* errors
*/
case '?':
error(ERROR_USAGE|4, "%s", opt_info.arg);
break;
case ':':
if (!last)
{
opt_info.again = 1;
return(1);
}
/*
* cross your fingers
*/
if (!(s = argv[opt_info.index]))
error(3, "%s", opt_info.arg);
if (opt_info.offset == 2 && (pp.arg_style & STYLE_gnu))
{
p = argv[opt_info.index + 1];
if (streq(s, "-$"))
{
ppop(PP_OPTION, "noid \"$\"");
goto ignore;
}
else if (streq(s, "-dD"))
{
pp.option |= DEFINITIONS;
goto ignore;
}
else if (streq(s, "-dM"))
{
pp.state |= NOTEXT;
pp.option |= KEEPNOTEXT|DEFINITIONS|PREDEFINITIONS;
pp.linesync = 0;
goto ignore;
}
else if (streq(s, "-imacros"))
{
if (p)
{
ppop(PP_READ, p);
opt_info.index++;
opt_info.offset = 0;
}
goto ignore;
}
else if (streq(s, "-include"))
{
if (p)
{
ppop(PP_TEXT, p);
opt_info.index++;
opt_info.offset = 0;
}
opt_info.offset = 0;
goto ignore;
}
else if (strneq(s, "-lang-", 6))
{
s += 6;
if (streq(s, "c"))
c = 0;
else if (streq(s, "c++"))
c = 1;
else if (streq(s, "objc"))
c = 2;
else if (streq(s, "objc++"))
c = 3;
ppop(PP_PLUSPLUS, c & 1);
if (c & 2)
ppop(PP_DIRECTIVE, "pragma pp:map \"/#(pragma )?import>/\" \"/#(pragma )?import(.*)/__STDPP__IMPORT__(\\2)/\"\n\
#macdef __STDPP__IMPORT__(x)\n\
#pragma pp:noallmultiple\n\
#include x\n\
#pragma pp:allmultiple\n\
#endmac");
goto ignore;
}
else if (streq(s, "-lint"))
{
ppop(PP_COMMENT, pplint);
goto ignore;
}
}
s += opt_info.offset - 1;
if (strmatch(s, "i*.h"))
ppop((pp.arg_style & STYLE_gnu) || s[1] == '/' ? PP_READ : PP_TEXT, s + 1);
else if (strmatch(s, "*@(nostandard|nostdinc)*"))
ppop(PP_STANDARD, "");
else if (strmatch(s, "*@(exten|xansi)*|std"))
{
ppop(PP_COMPATIBILITY, 0);
ppop(PP_TRANSITION, 1);
}
else if (strmatch(s, "*@(ansi|conform|pedantic|stand|std1|strict[!-])*"))
{
ppop(PP_COMPATIBILITY, 0);
ppop(PP_STRICT, 1);
if (strmatch(s, "*pedantic*"))
ppop(PP_PEDANTIC, 1);
}
else if (strmatch(s, "*@(trans)*"))
{
ppop(PP_COMPATIBILITY, 1);
ppop(PP_TRANSITION, 1);
}
else if (strmatch(s, "*@(classic|compat|std0|tradition|[kK][n&+][rR])*"))
{
ppop(PP_COMPATIBILITY, 1);
ppop(PP_TRANSITION, 0);
}
else if (strmatch(s, "*@(plusplus|++)*"))
ppop(PP_PLUSPLUS, 1);
else if (strmatch(s, "*@(warn)*"))
ppop(PP_WARN, 1);
/*
* ignore unknown options
* the probe info takes care of these
* fails if an option value is in the next arg
* and this is the last option
*/
if (argv[opt_info.index + 1] && argv[opt_info.index + 1][0] != '-' && argv[opt_info.index + 2] && argv[opt_info.index + 2][0] == '-')
{
opt_info.index++;
opt_info.offset = 0;
}
ignore:
while (argv[opt_info.index][opt_info.offset]) opt_info.offset++;
break;
}
if (!(s = argv[opt_info.index])) return(0);
switch (pp.arg_file)
{
case 0:
if (*s != '-' || *(s + 1)) ppop(PP_INPUT, s);
break;
case 1:
if (*s != '-' || *(s + 1)) ppop(PP_OUTPUT, s);
break;
default:
if (!last) return(1);
error(1, "%s: extraneous argument ignored", s);
break;
}
pp.arg_file++;
if (!argv[++opt_info.index]) return(0);
/*
* old versions allow options after file args
*/
}
}